Its a valid point and if say a party i hadnt voted for got in, i would have to like it or lump it, but, in essence i will have to faith (broadly speaking) that they will do what they think is the best for the UK, not what the EU parliament decides is the best for the EU or its own specific country, what may suit them, may not suit us. As elsewhere, there has to be a reason the elected British mps voted against these 576 proposals.
Right or wrong, fair or not, i would prefer to have the government the UK population elected deciding what rules and regs it wants to enforce, rather than the EU parliament, with a load of mp's from other countries we didnt elect.